1971 350ci 270hp
Thread Starter
Instructor
Joined: Mar 2009
Posts: 187
Likes: 1
From: WA
1971 350ci 270hp
What's the engine code? Everywhere I look shows the optional engines (LT1, LS5, LS6). So what did they call the 270hp (other than gutless)?
Purpose: I'm trying to find out more about my engine to see how far down I need to go before building up. Specifically cast/steel crank, 2/4-bolt main block, chamber and valve size of the heads, etc.
Thanks!
Purpose: I'm trying to find out more about my engine to see how far down I need to go before building up. Specifically cast/steel crank, 2/4-bolt main block, chamber and valve size of the heads, etc.
Thanks!
Thread Starter
Instructor
Joined: Mar 2009
Posts: 187
Likes: 1
From: WA
Of course, right after I post this thread I think I found what I was looking for. Please correct me if I'm wrong, but the 270hp was the L48 which has a cast iron crank, 76cc chamber heads, and a mere 8.5:1 compression ratio (dish pistons?). This explains its 1/4 mile run of 15.5 seconds in a test I found from 1971.
I've already made several enhancements, but it looks like I really need to attack those heads.
I've already made several enhancements, but it looks like I really need to attack those heads.
Race Director
Joined: Aug 2004
Posts: 10,628
Likes: 132
From: Duvall, WA
Your specs are correct. I have a '71 L48. I replaced the cam, installed an Edelbrock intake and installed 58cc L98 heads, put in a Dewitts radiator with an electric fan and managed a 14.2, which is fast enough for what is just a cruiser for me. You can do a lot of good by lowering the weight. I have an aluminum water pump and composite rear spring in addition to the other aluminum goodies.
Drifting
Joined: Sep 2006
Posts: 1,259
Likes: 2
From: MS
